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Search: id:A047383
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| A047383 |
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Numbers that are congruent to {1, 5} mod 7. |
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+0
3
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| 1, 5, 8, 12, 15, 19, 22, 26, 29, 33, 36, 40, 43, 47, 50, 54, 57, 61, 64, 68, 71, 75, 78, 82, 85, 89, 92, 96, 99, 103, 106, 110, 113, 117, 120, 124, 127, 131, 134, 138, 141, 145, 148, 152, 155, 159, 162, 166, 169
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n)=Ceiling[(7n+2)/2]
a(n)=7*n-a(n-1)-8 (with a(1)=1) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 23 2009]
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EXAMPLE
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For n=2, a(2)=7*2-1-8=5; n=3, a(3)=7*3-5-8=8; n=4, a(4)=7*4-8-8=12 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 23 2009]
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CROSSREFS
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Cf. A001106.
Sequence in context: A100493 A005661 A108173 this_sequence A133795 A145285 A167615
Adjacent sequences: A047380 A047381 A047382 this_sequence A047384 A047385 A047386
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KEYWORD
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nonn,new
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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